This Hazel Atlas Depression era green glass covered dish was advertised in sets of three as "Refrigerator Sets" in both square and round, as shown in their 1929 catalog (source: Weatherman book 2, page 116). It's 4-1/2 inches square by 2" high to the rim. The lid has a recessed handle for easy stacking. The dish is marked H over A on the bottom. One upper corner has flaked chipping as shown, which is covered by the lid.